* {
    margin: 0;
    padding: 0;
  }
  .small {
    width: 230px;
    height: 280px;
    float: left;
    /*border: 2px solid yellow;*/
  } 
  .slider {
    width: 50px;
    height: 50px;
    background: rgba(180,180,135,0.3);
    position: absolute;
    display: none;
  }
  #big {

    width: 200px;
    height: 200px;
    position: absolute;
    /* border: 2px solid red;*/
    overflow: hidden;
    display: none;
  }